SPEEDOMETER GEAR CHARTS C292 1979 SPEEDO GEAR USAGE CHART 4 40 l Q6 U DRIVE DRIVEN 42 kv G GEAR G GEAR 5 ADAPTER A 6261785 10 Purple N 3987919 19 Natural 345215 H 3950352 0 8242 C B 6261796 9 Red P 3987920 20 arue 345215 C 6261784 8 Orange O 3987922 22 Gray 345215 D 361002 7 Green R 3987921 21 Red 345215 4 E TIRE s1zE TRANS s z z 41 5 5 c ca v 1 R7s 14 E78 14 111138 A N 2 ER7s 14 E7a 14 2 as M15 A IBB 1 R79 14 E78 14 Mss A IZQ ER7314 E7a 14 2 73 M38 A IBB FR7B 14 E78 14 3 08 M20 1 E ER712 14 E78 14 M38 A n H P225 70R15 3 42 M38 C IEIE P225 7OR15 3 73 M21 Q IQ i wARER0us1N0 AND D45TR BUT ON DIVISION or GENERAL M0T0Rs CORPORAT ON CHEVROLET 10 4 000 GROUP 4 10 c REV 5 81